基于CFD的水下实验平台升沉阻力研究

Research on Heave Resistance of Underwater Experimental Platform Based on CFD

摘要:

为了选择出合适的水下实验平台的无动力下潜方向和预计出下潜时间，用 CFD 方法对水下实验平台的无动力下潜工况进行了数值模拟。通过与常用的摩擦阻力系数公式计算结果对比，选用了一组较为合适的网格进行 CFD 分析，通过 FLUENT 计算结果拟合出阻力系数与速度的函数，使用 Simulink 对水下实验平台无动力下潜的过程进行了仿真。最终选出以正向下潜为海试时的下潜方向，并得到了下潜过程的时间，通过与海试结果对比，验证了 CFD 计算结果的准确性。

Abstract:

In order to select the appropriate unpowered diving direction and estimated diving time of the underwater experimental platform，CFD method is used to simulate the underwater experimental platform under the working condition of no power submergence. Comparing to the calculation results of common friction resistance coefficient formula，a group of more appropriate grids are selected for CFD analysis，the function of resistance coefficient and velocity are fitted through the FLUENT calculation results，and the process of unpowered submergence of an underwater experimental platform is simulated by Simulink. Finally，the forward diving is selected as the diving direction during the sea trial，and the time of the diving process is obtained. Comparing to the sea trial results，the accuracy of the CFD calculation results is verified.